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https://github.com/rust-lang/rust
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840ed5d133
Make `Sharded` an enum and specialize it for the single thread case This changes `Sharded` to use a single shard by an enum, reducing the size of `Sharded` for greater cache efficiency. Performance improvement with 1 thread and `cfg(parallel_compiler)`: <table><tr><td rowspan="2">Benchmark</td><td colspan="1"><b>Before</b></th><td colspan="2"><b>After</b></th></tr><tr><td align="right">Time</td><td align="right">Time</td><td align="right">%</th></tr><tr><td>🟣 <b>clap</b>:check</td><td align="right">1.7009s</td><td align="right">1.6748s</td><td align="right">💚 -1.53%</td></tr><tr><td>🟣 <b>hyper</b>:check</td><td align="right">0.2525s</td><td align="right">0.2451s</td><td align="right">💚 -2.90%</td></tr><tr><td>🟣 <b>regex</b>:check</td><td align="right">0.9519s</td><td align="right">0.9353s</td><td align="right">💚 -1.74%</td></tr><tr><td>🟣 <b>syn</b>:check</td><td align="right">1.5504s</td><td align="right">1.5280s</td><td align="right">💚 -1.45%</td></tr><tr><td>🟣 <b>syntex_syntax</b>:check</td><td align="right">5.9536s</td><td align="right">5.8873s</td><td align="right">💚 -1.11%</td></tr><tr><td>Total</td><td align="right">10.4092s</td><td align="right">10.2706s</td><td align="right">💚 -1.33%</td></tr><tr><td>Summary</td><td align="right">1.0000s</td><td align="right">0.9825s</td><td align="right">💚 -1.75%</td></tr></table> I did see an unexpected 0.23% change for the serial compiler, so this could use a perf run to see if that reproduces. cc `@SparrowLii` |
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rustc | ||
rustc_abi | ||
rustc_arena | ||
rustc_ast | ||
rustc_ast_lowering | ||
rustc_ast_passes | ||
rustc_ast_pretty | ||
rustc_attr | ||
rustc_baked_icu_data | ||
rustc_borrowck | ||
rustc_builtin_macros | ||
rustc_codegen_cranelift | ||
rustc_codegen_gcc | ||
rustc_codegen_llvm | ||
rustc_codegen_ssa | ||
rustc_const_eval | ||
rustc_data_structures | ||
rustc_driver | ||
rustc_driver_impl | ||
rustc_error_codes | ||
rustc_error_messages | ||
rustc_errors | ||
rustc_expand | ||
rustc_feature | ||
rustc_fluent_macro | ||
rustc_fs_util | ||
rustc_graphviz | ||
rustc_hir | ||
rustc_hir_analysis | ||
rustc_hir_pretty | ||
rustc_hir_typeck | ||
rustc_incremental | ||
rustc_index | ||
rustc_infer | ||
rustc_interface | ||
rustc_lexer | ||
rustc_lint | ||
rustc_lint_defs | ||
rustc_llvm | ||
rustc_log | ||
rustc_macros | ||
rustc_metadata | ||
rustc_middle | ||
rustc_mir_build | ||
rustc_mir_dataflow | ||
rustc_mir_transform | ||
rustc_monomorphize | ||
rustc_parse | ||
rustc_parse_format | ||
rustc_passes | ||
rustc_plugin_impl | ||
rustc_privacy | ||
rustc_query_impl | ||
rustc_query_system | ||
rustc_resolve | ||
rustc_serialize | ||
rustc_session | ||
rustc_smir | ||
rustc_span | ||
rustc_symbol_mangling | ||
rustc_target | ||
rustc_trait_selection | ||
rustc_traits | ||
rustc_transmute | ||
rustc_ty_utils | ||
rustc_type_ir |